QUOTE(rigo3t @ Oct 17 2015, 12:25 AM)
That's a fiddly topic and everyone has their opinions and their own practices on this.
Generally it is not advised to "freewheel" your car or let it coast neutral. Because in the event that you need to pick up speed suddenly for whichever reason or the brakes fail, also for whichever reason you're really not in control of your speed in any way.
Also, the owner's manual does not encourage you to do it either. The car must be in gear.
Before you do engine braking in a manual car though ensure you speed match your rpms to your speed or you will cause premature wear in your clutch. Ultimately it is cheaper to replace brakes than the clutch, and faster too. You may slow down with your brakes and drop a gear when the car starts to reach 1k, this is what I do to ensure minimal engine and clutch wear and I only do engine braking if it's a long downhill or going down a hill road for extended periods of time to avoid brake fading.
I used to engine brake all the time, to arrive at any stop going from 5th to 2nd and neutral but that put a lot of stress on my clutch and needed replacement in three years on my Mivy so now, on my new MT Iriz, I'm eating my brakes, no problem. Cheap and fast replacement when required. And no free wheeling unless I'm about to roll naturally into a stop light or something at very low speeds like 10 km/h.
Just my opinion.
(All this is "YouTube-able" too)
yes, the debate for MT cars whether to be in gear or neutral when coasting downhill has 2 school of thoughts. Both are neither right nor wrong, even some car "experts" are split between the debate.Generally it is not advised to "freewheel" your car or let it coast neutral. Because in the event that you need to pick up speed suddenly for whichever reason or the brakes fail, also for whichever reason you're really not in control of your speed in any way.
Also, the owner's manual does not encourage you to do it either. The car must be in gear.
Before you do engine braking in a manual car though ensure you speed match your rpms to your speed or you will cause premature wear in your clutch. Ultimately it is cheaper to replace brakes than the clutch, and faster too. You may slow down with your brakes and drop a gear when the car starts to reach 1k, this is what I do to ensure minimal engine and clutch wear and I only do engine braking if it's a long downhill or going down a hill road for extended periods of time to avoid brake fading.
I used to engine brake all the time, to arrive at any stop going from 5th to 2nd and neutral but that put a lot of stress on my clutch and needed replacement in three years on my Mivy so now, on my new MT Iriz, I'm eating my brakes, no problem. Cheap and fast replacement when required. And no free wheeling unless I'm about to roll naturally into a stop light or something at very low speeds like 10 km/h.
Just my opinion.
(All this is "YouTube-able" too)
Ultimately, it is true as well for the safety factor that necessitates you to always be in gear and not neutral when coasting. In fact, if im not mistaken in the US, it is illegal to be in neutral and one must always be in gear (even at traffic lights!). But this "law" is almost never enforced at all. (it is mostly there for the safety factor in case of emergencies). Hence, the reason many are 50/50 on this.
But for most experienced drivers who have driven manual for a very long time, most of them just coast downhill/to a stop in Neutral. Well because they have been driving for a long time, so even in emergency situations one can react fast enough because they know what to do and not panic. Needless to say, attention to the road is very important.
Hence, if you are a new driver or new to manual transmissions, it's adviced to always be in gear so that you can react appropriately in case of emergencies.
As for the wear and tear parts, it is as you have already explained. Ultimately, whether you want to replace your clutch or brake pads first. and of course brake pads are way cheaper to replace than the clutch.
All these talk however does not apply to auto transmissions. In whatever situation, it is never a good idea to shift from D to N and back to D to coast downhill. Because it puts a lot of load on the transmission system, and if damaged is wayyyyyyy costlier than replacing worn out brake pads.. Which brings the dilemma to us CVT users, the engine braking on Iriz is just too aggressive and we can't do anything about it.. Which sucks..
This post has been edited by LordDenning: Oct 17 2015, 12:54 AM
Oct 17 2015, 12:44 AM

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